Răspuns :
jumatate de KM -> 500m
in fiecare zi 100m
5x100=500 => in 5 zile
in fiecare zi 100m
5x100=500 => in 5 zile
jumatate de KM -500
in fiecare zi 100 m
5X100=500m =>in cinci zile
in fiecare zi 100 m
5X100=500m =>in cinci zile